<!DOCTYPE html>
<html lang="en">
<head>
          <meta charset="UTF-8">
          <meta name="viewport" content="width=device-width, initial-scale=1.0">
          <title>Document</title>
</head>
<body bgcolor="aquamarine">
          <p>点击按钮，弹出对话框</p>
          <input type="button" value="点击" onclick="alert('猜猜我是谁?')"
</body>
</html>